Revert "Update ExUnit.Assertions docs, closes #1493"

This reverts commit 655a3c7d70c798ed108988af48786ef9fd16d4aa.
Avoid echo with no args on windows
Clean up Elixir path related tests
Trivial wording changes in the Changelog
Merge pull request #1497 from pragdave/master

Trivial wording changes in the Changelog
Update @on_definition docs
Ensure path dependencies are compiled on mix deps.get
No longer clean or unlock deps unless --all is given
Return :ok from FileCase callbacks